#2F3940
Closest named color: Onyx (#343A40). oklch(33.8% 0.018 238.6), rgb(47, 57, 64).
Aa
White text reads best on this color (11.79:1).
About this color
#2F3940 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.009 away. White text reads best on it, at 11.79:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.78:1 |
| White text | 11.79:1 |
Values
| HEX | #2F3940 |
| RGB | rgb(47, 57, 64) |
| HSL | hsl(205, 15%, 22%) |
| OKLCH | oklch(33.8% 0.018 238.6) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #2F3940 | 11.79:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #2F3940 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #2F3940 text on white | 11.79:1 | AAA | Lc 97.1 | Preferred for body text |
| #2F3940 text on black | 1.78:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 900.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E7EAEC
oklch(93.5% 0.004 236.5)
-
Step 200
200
#D5DADE
oklch(88.6% 0.008 241.7)
-
Step 300
300
#B9C2C9
oklch(80.9% 0.014 241)
-
Step 400
400
#95A3AD
oklch(70.8% 0.022 238.8)
-
Step 500
500
#7A8C99
oklch(63% 0.029 239.3)
-
Step 600
600
#637683
oklch(55.5% 0.03 238)
-
Step 700
700
#52636F
oklch(49% 0.028 238.9)
-
Step 800
800
#43515B
oklch(42.7% 0.024 239.2)
-
Step 900
900 (this color)
#2F3940
oklch(33.8% 0.018 238.6)
-
Step 950
950
#21272C
oklch(26.9% 0.013 243.3)
#2F3940 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #363940 | 0.011 |
| Deuteranopia (no green cones) | #343740 | 0.010 |
| Tritanopia (no blue cones) | #2A3B3B | 0.015 |
| Achromatopsia (no color) | #383838 | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F3940
#2F3940
oklch(33.8% 0.018 238.6)
- #3F352E
#3F352E
oklch(33.7% 0.019 57)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #2F3940, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.009
- Gunmetal #293241 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.035
- Midnight Green #073B4C ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.043
- Charcoal #264653 ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.052
Use #2F3940 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.